1366 - Incorrect integer value: '' for column `CP_as15`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '5bn9j2qkrlou1op2somgfk48b7', '3.16.15.215', '1738999585', '1738999585', '/index.php?XTCsid=b08vstu7leg8ef8i43caoskln6&cat=c509_Fahrrad---E-Bike-Akkus.html')

[XT SQL Error]